Metallisable polyazo dyestuffs



United States Patent METALLISABLE POLYAZO DYESTUFFS Rudolf Durig, Basel, Switzerland, assignor to J. R. Gcigy A.-G., Basel, Switzerland, 21 Swiss firm No Drawing. Application August 24, 1956,

Serial No. 605,936

Claims priority, application Switzerland September 15, 1955 6 Claims. (Cl. 260-159) The invention concerns substantive metallisable polyazo dyestuffs, the complex heavy metal compounds thereof, in particular the complex copper compounds, processes for their production and their use for the dyeing of cellulose material in fast, olive, olive-gray to green shades.

It has been found that valuable, substantive, metallisable polyazo dyestuffs are obtained if a monoazo dyestufl? of the general Formula I coupling in the o-position to the naphtholic hydroxyl group, is coupled in an alkaline medium with the diazo compound of a p-aminoazo dyestuff which contains an alkoxy group in the o-position to the diazotised amino group. In this coupling, the components are so chosen that the polyazo dyestufis according to the invention con tain at least one sulphonic acid group. I

In this general Formula I:

Z represents the acetoacetylamino radical or the 3-methyl- S-pyrazolone radical which is bound at the amide nitrogen atom, or, in the 1-position to the naphthalene nucleus respectively and is bound at the a-carbon atom or, in the 4-position to the azo group respectively, and

E represents the radical of a diazo component of the henzene series which contains a metallisable group in the o-position to the azo linkage.

Monoazo dyestufis of the general Formula I usable according to the present invention are obtained by coupling acetoacetyl derivatives which can be coupled in the oaposition to the naphtholic hydroxyl group, and l-aryl- 3-methyl-5-pyrazolones which are derived from aminonaphthols or aminonaphthol sulphonic acids with diazo compounds of the benzene series which contain a metallisable substituent in the neighbouring position to the azo group, e. g. a hydroxyl and, preferably, a carboxyl group, the coupling being performed in a wealnly acid, e. g. acetic acid, neutral to weakly basic, e. g. alkali bicarbonate, agent. Examples of diazo components are: 2- aminobenzene-l-carboxylic acid, 5-nitro-, S-acetylor benzoy1amino-2-aminobenzene-l-carboxylic acid, 4-amino- S-carboxydiphenyl urea-4'-sulphonic acid, 4-chloro-2- aminobenzene-l-carboxylic acid, Z-amino-l-carboxybenzene-5-sulphonic acid, -5-sulphonic acid amide, -5-sulphonic acid monomethylarnide, or -5-sulphonic acid diethy lamide, also 2-amino-1-hydroxybenzenes which can be substituted in the usual positions for example by halogen, alkyl, alkoxy, nitro, acylamino, sulphonic acid, sulphonic acid amide, carboxyl and carboxylic acid amide groups. The Z-aminobenzene-l-carboxylic acids are preferred because they give polyazo dyestuffs according to the present invention of purer shades. The diazotised o-aminophenols are coupled advantageously with the acetoacetylamino compound. The azo components used in this case are obtained by known methods from aminonaphthols and from aminonaphthol sulphonic acids which couple in the o-position to the hydroxyl group, for example by the action of acetoacetic esters or of diketene or by diazotisation of the amino group, reduction of the diazo to the hydrazino group and condensation with acetoacetic esters or with diketene. They can be derived for example from 1'- or Z-amino-7-hydroxynaphthalene, from 1-amino-7-hydroxynaphthalene-3-sulphonic acid, 2- amino-5-hydroxynaphthalene-7-sulphonic acid, 2-amino-8- hydroxynaphthalene-6-sulphonic acid, l-amino-S-hydroxynaphthalene-6-sulphonic acid, 1-amino-8-hydroxynaphthalene-3.6- or -4.6-disulphonic acid, l-amino-S-hydroxynaphthalene-7-sulphonic acid and, preferably from 2- amino-6-hydroxynaphthalene-8-sulphonic acid. The latter component is suitable for the production of valuable, green dyestuffs which are distinguished by the good fastness to light of the copper containing cellulose dyeings. In general, monoazo dyestufis of the general Formula I are preferred which contain a sulphonated hydroxynaphthyl radical.

Diazotised p-aminoazo dyestufis which, as alkoxy group in the o-position to the diazo group, can contain for example a methoxy, or carboxymethoxy group can be used for the alkaline coupling. They can contain the substituents usual in azo dyestufls, for example, halogen, alkyl, hydroxyl, alkoxy, acylamino, nitro, carboxyl, sulphonic acid, carbamide and sulphonic acid amide groups. They are obtained by coupling the diazo compounds of any starting component desired, those for example of the benzene, naphthalene, stilbene series, or of the heterocyc-lic aromatic series such as for example, the thiazoie, triazole or tetrazole series, with any o-alkoxyamino compounds of the benzene and naphthalene series coupling in the p-position to the amino group. Examples of starting components are: l-amin0benzene3- or -4-sulphonic acid, S-arnino-Z-hydroxybenzene-l-carboxylic acid, 5-(3' or 4'-aminobenzoyl)-amino-2-hydroxybenzene-l-carboxylic acid, S-amino-Z-chlorobenzene-l-sulphonic acid, dehydro-p-toluidine monosulphonic acid, 4-nitroor 4- acetylaminoor 4-benzoylamino-4-aminostilbene-2.2- disulphonic acid, 4-[(4.5:1.2"-naphtho)-1'.2'.3-triazolyl (2')] 4 aminostilbene 2.2'.6" trisulphonic acid. Also however, compounds containing arylazo groups such as 4-amino-2-methyl-1.1-azobenzene-2- or -4-sulphonic acid, 4amino-4'-hydroxy3'-carboxy1.1- azobenzene or 4(3"- or 4-aminobenzoylamino)-4-hydroxy-3'-carboxy-1.1'-azobenzene, can be used. However, if purity of shade is desired, the p-amino monoazo dyestuffs are to be preferred to the p-arnino disazo dyestuffs, i. e. starting components not containing arylazo groups, are used. Examples of middle components are: S-methyl-Z-rnethoxy-l-aminobenzene. 2.5-dimethoxy-1- aminobenzene, 5-ethoXy-2-methoxy-l-aminobenzene, 2- methoxy-l-aminonaphthalene, Z-methoxyor Z-carboxymethoxy-l-aminonaphthalene-6- or -7-sulphonic acid.

The p-aminoazo dyestufi is idiazotised according to the usual methods, often with advantage according to the indirect method, by pouring the solution of the alkali salt, which solution contains alkali nitrite, in the cold into mineral acid.

The diazo compounds so obtained are coupled with the monoazo dyestutf of the general Formula I in an alkaline medium, for example in the presence of sodium carbonate, ammonia or magnesium oxide. Often the addition of a tertiary nitrogen base is advantageous to accelerate the coupling. For example, pyridine bases, tertiary alkanolamines or trialkylamines can be used.

The new polyazo dyestuffs correspond to the general Formula II:

3 p 4 wherein: disulphonic acid derivatives are used as starting compo- A represents the radical of a diazo component of the Helm, the new polyazo dyestuffs can be PP benzene series, in particular" the sulphophenyl, hydroxy- Stance also y known methods 1 the coppef'contalflmg carboxyphenyl, phenylcal-bamylphenyl, styrylphenyl, dyestuffs can be used for the dyeing of cellulose. p pheny1pheny1 or arylazophenyl radicals, The following examples illustrate the invention without B represents the radical of a middle component selected hmltlng 1t any The temperatufe are glven 111 from h group consisting of 3. h -1 4 h 1 degrees centigrade and, where not otherwise stated, the 3-carboxymethoxy-1.4-phenylene, 3-methoxy-l.4-naphparts are given as parts by weight. The relationship of thylene and 3-carboxymethoxy-1.4-naphthylene radiparts by weight to parts by volume is as that of kilocals, grammes to litres.

Example 1 OOH; OH

NOZGCHZCH-Qr-N: N=N on 01 aloha s'onz NH-GQ-oH-NnmO $0111 SW1 1 SOSH D represents the radical of a naphtholic component se- 22.3 parts of 5-chloro-3-amino-4-hydroxybenzene-1- lected from the group consisting of acetoacetylamino 25 sulphonic acid are diazotised in the usual way. The clear hydroxynaphthalene and 3-methyl-5-pyrazolonyl-(1)- diazo solution is gradually poured into a solution of 32.3 hydroxynaphthalene radicals bound to the second azo parts of Z-acetoacetylamino-S-hydroxynaphthalene-7-sulgroup in o-position to the hydroxyl group and to the phonic acid and 18 parts of sodium carbonate in 700 parts third azo group in the adjacent position to the enolisof water. The dyestuff formation is complete after a few able keto group. 30 hours. The yellow monoazo dyestufi' obtained is precipi- E represents the radical of a diazo component selected tated by the addition of 20% by volume of sodium chlofrom the group consisting of o-hydroxybenzene and ride, isolated and washed with salt water. It diso-carboxybenzene radicals, said polyazo dyestutfs pos solves in water and in concentrated sulphuric acid with sessing at least one sulphonic acid group. a yellow colour.

The 2-acetoacetylamino-S-hydroxynaphthalene-7-sulphonic acid is obtained by reacting diketene with the aqueous solution of the sodium salt of 2-amino-S-hydroxynaphthalene-7-sulphonic acid at room temperature until f the primary amino group disappears.

To form the trisazo dyestuff, 66.4 parts of the amino- 40 azo dyestulf from diazotised 4-nitro-4'-aminostilbene-2.2- disulphonic acid and 1-amino-Z-methoxynaphthalene-6- (m) sulphonic acid are dissolved in 1500 parts of Water at 15 in the presence of a little sodium carbonate. A solution of 7.6 parts of sodium nitrite in parts of water is then added and the whole is poured into 42 parts of bydrochloric acid and 80 parts of water at 15. After stirring for some hours, the pale brown diazo compound is formed, whereupon it is cooled to 0-5 with ice and then poured into a soda alkaline solution of the yellow monoazo dyestutf described in the first paragraph of the present example in 1000 parts of water, which solution contains 10% by volume of pyridine. The coupling is complete in a short time and the dyestutf is precipitated by the addition of a little sodium chloride, isolated and washed.

To form the copper complex compound, the damp filter cake is dissolved in 1000 parts of water of 90. 30 parts of sodium acetate are added, the dyestulf is precipitated with a little acetic acid and 200 parts of a one molar Y2 Z N=N E (IV) copper sulphate solution are immediately poured in. The

60 whole is stirred for 3 to 4 hours at 95100 and the dyewherein one Y represents hydrogen and the other Y repstuff is isolated by the addition of 10% by volume of resents hydrogen or the sulphonic acid group, R represents sodium chloride and filtration of the precipitate.

A preferred group of polyazo dyestuffs according to the present invention corresponds to the formula:

wherein one X represents thehydroxyl group and the other 45 X represents the radical AN=NBN=N- and all other symbols have the meanings given in Formulae I and II.

Of particular value because of their very good fastness to light are polyazo dyestulfs according to the present invention of the formula:

the methoxy or carboxyrnethoxy group, and all other The trisazo dyestuff containing copper so obtained dissymbols have the meanings given in Formulae I and II. solves in warm water and in concentrated sulphuric acid The new metallisable polyazo dyestuffs are dark powwith an olive green colour. It dyes cotton and other ders which, in the form of their alkali salts, e. g. the cellulose material direct in olive green shades which have sodium, potassium, lithium, caesium or ammonium salts, good fastness to washing and water and excellent fastdissolve in water with a grey, olive to green colour. ness to light. The viscose dyeings are distinguished From an aqueous solution in the warm in the presence chiefly by their excellent fastness to anti-crease procof Glaubers salt, they draw onto cellulose material as well essing. as textile fibres made up from natural or regenerated cel- Further dyestufis are given in the following table which lulose and are fixed wet-and-light fast on these fibres by can be obtained in a similar manner according to coppering according to known methods. Provided their Example 1 by diazotising the aminoazo dyestuffs obtained complex copper compounds have suflicient water solufrom columns 1 and 2 and coupling with the yellow bility, which for example is the case when aminostilbene monoazo dyestuffs obtained from columns 3 and 4.

No. Starting Component: Middle Monoazo dyestufl from azo component and dlazo Shade Component I compound ofsom mm 0H 100E 1s 01 NE; NH: 80.11 NHPO Do.

OaH /N\ CHI c1 I (INCH: 7 OH COOH 19..--.. NH, -NH som NH Do.

OCH: 011 00011 20... omooNn- NH, l I

NH: 8am NHz-ONHOOOH: olive green;

soul Nucoomoo CHI OCH: H0 Nnooomooom OH 80511 21..---. NO -QCIEOH- NHi l I 7 NH, NH, olive. SOzH s0|H SO;H 1 V 1 soifi soln I OCH; NHCOOH OOOH; OH 22 -NH; N112 m NH;Q D0,

OIH

son:

B0111 OCH: I Nnooomooom 11 01 23...-.. ONE; NH, How NHIQ Do.

I v O|H Example 2 00011 0011100011 0H NHco'eH-N=N 0 soul 1 0mm H 58 parts of the aminoazo dyestuif from diezotised 5-'(4'- in Example 1 and coupled, in the presence of pyridine, aminobenzoyl) -amino 2-hydroxybenzene-Lcarboxylic with 52.2 parts of the yellow monoazo dyestuif from acid and l-amino-2-carboxymethoxynaphthalne-G-sul- 3-amino-4-hydroxybenzene-l-sulphonic acid .amide and phonic acid are diazotised in the same manner as described Z-acetoacetylamino 6 hydroxynaphthalene 8-sulphonie 11 acid. The isolated trisazo dyestuff dyes cotton and staple fibres in pure green shades which on being after treated with copper salts, become very fast to washing and excellently'fast to light. The viscosedyeings, in addition, are very stable toganti-crease processing.

Some dyestuffs are given in the following table which can be obtained in a very; similarmanner, the dyeings on cellulose materials of which also have very good fastness 5 properties.

N 0. Starting Component Middle Shade Monoazo dyestufl from azo component and dlazo Component compound 0!- COOH OCHzCOOH OH M 00011 1 HO- NHC O-O-NHr NH 80111 NH; NH olive.

CH: SOrH NHCOGHaGO CH: 300B OCHICOOH (|)H 0H 2 HOG NHo0- -NH, NH, son: Nix-Q D0.

' V l BIO:

NH| NBC 0 CHaC O COOH OCHICOOH 0H 0H 01 V a H0 -NHC Q-O-NH: soin NH Do.

7 son;

H0O CHCO COOH OCHaCOOH CODE COOH OCHiCOOH Oman: oO-NH, NH:

son: NIL-O Do.

CHa- Example 3 COOH OOH! CHI 7 NH-CDeOH-NIIN 41.7 parts of the aminoazo dyestuff from diazotised 5- 70 acetoacetylamino-tS-hydroxynaphthalene-8-sulphonic acid.

amino-Z-hydroxybenzene-l-carboxylic acid and l-amino- 2-methoxy naphthalene-S-sulgihonic acidTare diazotised in the manner described insExample 1 and coupled in the presence. of pyridine with 47.1 parts of the yellow monoazo dyestuiffrom Z-aminobenzene-l-carboxylic acid and 2-47.

A trisazo dyestuff is obtained which dyes cellulose fibres a pure green shade; The 'wet-w and light-.fastness propertieseare considerablyv increased by after treatment with copper salt solutions. 7

It in this: example, the YZ-acetoacetyXamino- G-hydmxW Example 4 The amino disazo dyestufl from the diazo compound of 25.7 parts of 4-amino-4-hydroxy-1.1-azobenzene-3-carboxylic acid and l-amino-Z-carboxymethoxy naphthalene- 6-sulphonic acid is diazotised in the same manner as described in Example 1 and coupled in the presence of pyridine with 47.1 parts of the yellow monoazo dyestufifrom. Z-aminobenzene-l-carboxylic acid and 2-acetoacetylamino isolated 26 6-hydroxynaphthalene-8-sulphonic acid. The tetrakisazo dyestufi dyes cellulose material in olive shades which, on after treatment with copper salts, have very good fastness to washing and light.

If, instead of l-amino-Z-carboxymethoxy naphthalene- 6-sulphonic acid, l-amino-Z-methoxy naphthalene-6-su1- 30 phonic acid is used, then a similar dyestuff is obtained.

Example 5 2 parts of the dyestutf obtained according to Example 1 are dissolved in a dyebath containing 3000 parts of water and 1 part of sodium carbonate. 100 parts of cotton are entered at -50, the bath is heated within 30 minutes to 9095 30 parts of sodium sulphate are added and dyeing is continued for minutes at this temperature. After 40 this time, the dye goods are rinsed cold in the usual way l and dried. In this manner the cotton is dyed in olive green shades which have good wet fastness properties and excellent fastness to light.

SiOsH O OH: OH

BOIH

COOH

5 The goods are then rinsed cold and dried.

SOaH

If a dyestuti as obtained according to Examples 2, 3'01 4 is used for dyeing, then, after rinsing, the dyed cotton is after treated in a fresh bath with 2 parts of, copper sulphate and 2 parts of acetic acid for 30 minutes at In this way, the

OGHQCOOH OH coon A wherein:

A represents the radical of a diazo component of the benzene series,

B represents the radical of a middle component selected from the group consisting of 3-methoxy-L4-phenylene, 3-carboxymethoxy-l.4-phenylene, 3-methoxy-1.4-naphthylene and 3-carboxymethoxy-l.4-naphthylene radicals,

D represents the radical of a naphtholic component selected from the group consisting of acetoacetylamino hydroxynaphthalene and 3-methyl-5-pyrazo1onyl-( l hydroxynaphthalene radicals bound to the second azo group in o-position to the hydroxyl group and to the third azo group in the adjacent position to the enclisable keto group,

B represents the radical of a diazo component selected from the group consisting of o-hydroxybenzene and o-carboxybenzene radicals,

said polyazo dyestufi possessing at least one sulphonic acid group.

2. A polyazodyestufl having the formula:

3. A polyazo dyestufi having the formula:

4. A polyazo dyestuif having the formula:

HOGNHO M M. .0...

C==GN===N-P No references cited. 

1. A POLYAZO DYESTUFF HAVING THE GENERAL FORMULA: 